/* 初始化 */
body, dl, dd, ul, ol, h1, h2, h3, h4, h5, h6, pre, form, input, textarea, p, hr, thead, tbody, tfoot, th, td {
    margin: 0;
    padding: 0;
    line-height: 1;

}

body {
    background-color: #fff;
    font-family: "microsoft yahei", "simhei", Arial, sans-serif;
    font-size: 16px;
}

ul, li {
    list-style: none;
    padding: 0;
    margin: 0;
}

input {
    border: none;
    outline: none;
}

a, a:hover, a:active, a:focus {
    text-decoration: none;
}

/* 通用样式 */
/* 单行文本溢出显示省略号 */
.ellipsis {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 多行文本溢出显示省略号 */
.more-line-ellipsis {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    /* 设置n行，也包括1 */
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.st_w1200 {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

.st_title {
    font-size: 36px;
    line-height: 36px;
    text-align: center;
    margin-bottom: 20px;
    color: rgba(51, 51, 51, 1);
}

.st_desc {
    font-size: 18px;
    line-height: 36px;
    max-width: 740px;
    margin: auto;
    text-align: center;
    color: rgba(128, 128, 128, 1);
}

.st_fs24 {
    font-size: 24px;
}

.st_fs20 {
    font-size: 20px;
}

.st_fs16 {
    font-size: 16px;
}

.st_fs14 {
    font-size: 14px;
    line-height: 24px;
}

.st_block2 {
    padding: 80px 0;
}

.st_block2_main {
    position: relative;
    margin-top: 50px;
}

.st_block2_item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 15px;
    margin-bottom: 60px;
}

.st_block2_docs .st_fs24 {
    text-align: center;
    margin-bottom: 15px;
}

.st_block2_descs .st_fs14 {
    text-align: center;
    color: rgba(102, 102, 102, 1);
}

/* 模块6 */
.st_block6 {
    padding: 86px 0 70px;
}

.st_block6_main {
    display: flex;
    justify-content: space-between;
    margin-top: 70px;
}

.st_block6_list {
    width: calc(50% - 20px);
}

.st_block6_item {
    margin-bottom: 30px;
}

.st_block6_docs {
    padding: 21px 0 10px;
    background: rgba(255, 255, 255, 1);
    box-shadow: 0px 0px 30px 0px rgba(0, 0, 0, 0.06);
}

.st_block6_question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    width: 100%;
    margin-bottom: 10px;

}

.st_block6_question .st_fs16 {
    color: #000;
    line-height: 30px;
}

.drop_down i {
    color: rgba(128, 128, 128, 1);
    cursor: pointer;
}

.drop_down .icon-jianhao {
    display: none;
}

.st_block6_docs.on .drop_down .icon-jianhao {
    display: block;
}

.st_block6_docs.on .drop_down .icon-jiahao {
    display: none;
}

.st_block6_docs.on .st_block6_question .st_fs16 {
    color: rgba(102, 102, 102, 1);
}

.st_block6_answer {
    display: none;
    padding: 0 20px;
}

.st_block6_answer .st_fs16 {
    line-height: 30px;
}

/* 模块7 */
.st_block7 {
    padding: 66px 0 80px;
}

.st_block7_main {
    padding-top: 66px;
}

.st_block7_box {
    margin-bottom: 40px;
}

.st_block7_box img {
    width: 100%;
}

.st_block7_docs {
    margin-top: 10px;
}

.st_block7_docs .st_fs14 {
    text-align: center;
}

/* 模块3 */
.st_block3 {
    padding: 60px 0;
}

.st_block3 .st_title {
    color: #fff;
}

.st_block3 .st_desc {
    color: #fff;
}

.st_block3_main {
    padding-top: 50px;
}

.st_block3_main .row {
    margin-right: -8px;
    margin-left: -8px;
}

.st_block3_main .row .col-md-4 {
    padding-left: 8px;
    padding-right: 8px;
}

.st_block3_item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #fff;
    border-radius: 8px;
    padding: 50px 0 60px;
    margin-bottom: 50px;
}


/* 头部 */

.st_head {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99;
    background-color: rgba(0, 0, 0, 0);
    transition: all .5s;
}

.st_head.active {
    background-color: rgba(0, 0, 0, .85);
}

.st_head_ctn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.st_logo img {
    height: 45px;
}

.st_nav {
    display: flex;
}


.st_nav li a {
    font-size: 16px;
    padding: 0 22px;
    color: #fff;
    line-height: 80px;
}

.st_nav li.st_active a {
    color: rgba(250, 206, 11, 1);
}

.st_ph_menu {
    display: none;
    overflow: hidden;
    width: 26px;
    height: 50px;
    margin-left: 15px
}

.st_phmenubox {
    width: 26px;
    height: 50px;
    cursor: pointer;
    text-align: center;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.st_phmenubox .st_point {
    position: relative;
    display: inline-block;
    width: 26px;
    height: 22px;
    margin-top: 15px;
    transform: translateX(-3px);
}


.st_ph_btn {
    display: inline-block;
    width: 26px;
    height: 1px;
    background-color: #fff;
    position: absolute;
    top: 10px;
    right: 0;
}

.st_fixed .st_ph_btn {
    background-color: #333;
}


.st_ph_btn::before,
.st_ph_btn::after {
    content: "";
    display: inline-block;
    width: 26px;
    height: 1px;
    background-color: #fff;
    position: absolute;
    right: 0;
    transition: all .3s;
}

.st_fixed .st_ph_btn::before,
.st_fixed .st_ph_btn::after {
    background-color: #333;
}

.st_ph_btn::before {
    top: 8px;
}

.st_ph_btn::after {
    top: -8px;
}

.st_point.active .st_ph_btn {
    background-color: transparent;
}

.st_point.active .st_ph_btn::before {
    top: 0;
    transform: rotate(-45deg);
}

.st_point.active .st_ph_btn::after {
    top: 0;
    transform: rotate(45deg);
}

/* 底部 */
.st_foot_top {
    padding: 46px 0;
}

.st_foot_topbox {
    display: flex;
    justify-content: space-evenly;
}

.st_foot_topbox_item {
    position: relative;
}

.st_foot_top_docs {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 8px 13px;
}

.st_foot_top_docs>img {
    height: 100%;
    margin-right: 20px;
}

.st_foot_top_docs p {
    font-size: 14px;
    line-height: 24px;
    color: rgba(255, 255, 255, 1);
}

.st_foot_top_docs .weibo {
    height: 57px;
}

.st_foot_bottom {
    padding: 40px 0;
    background-color: #000;
}

.st_foot_bootom_main {
    display: flex;
    align-items: center;
    justify-content: center;
}

.st_foot_bootom_docs p {
    font-size: 14px;
    line-height: 24px;
    color: rgba(255, 255, 255, 1);
}

.st_foot_logo {
    margin-right: 32px;
}

@media screen and (max-width:1400px) {
    .st_title {
        font-size: 26px;
    }

    .st_desc {
        font-size: 16px;
    }

    .st_fs24 {
        font-size: 20px;
    }

    .st_fs20 {
        font-size: 18px;
    }
}

@media screen and (max-width:992px) {


    .st_ph_menu {
        display: block;
    }

    .st_head.on {
        transition: none;
        background-color: #000;
    }

    .st_logo img {
        height: 36px;
    }

    .st_head_ctn {
        height: 64px;
    }

    .st_head.on .st_navlist {
        border-top: 1px solid #4d4d4d;
    }



    .st_navlist {
        display: block;
        position: fixed;
        left: 0;
        top: 64px;
        width: 100%;
        height: calc(100vh - 64px);
        overflow: auto;
        pointer-events: none;
        z-index: 98;
        border-top: 1px solid transparent;
    }

    .st_navlist::before {
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        background: rgba(0, 0, 0, .5);
        opacity: 0;
        transition: all .36s;
    }

    .st_navlist.active .st_nav {
        display: block;
    }

    .st_navlist.active {
        pointer-events: all;
    }

    .st_navlist.active::before {
        opacity: 1;
    }

    .st_nav {
        display: none;
        background-color: #000;
    }

    .st_nav>li {}

    .st_nav li a {
        width: 100%;
        display: block;
        line-height: 48px;
        font-size: 14px;
    }

    /* 底部 */
    .st_foot_topbox {
        flex-direction: column;
    }

    .st_foot_topbox_item {
        margin-bottom: 20px;
    }

    .st_foot_topbox_item>img {
        width: 100%;
        height: 88px;
        object-fit: cover;
        border-radius: 8px;
    }

    .st_foot_bootom_main {
        flex-direction: column;
    }

    .st_foot_logo {
        margin-bottom: 10px;
    }



    /* .block6 */
    .st_block6_main {
        flex-direction: column;
    }

    .st_block6_list {
        width: 100%;
    }
}